The SF world has a long history of "fix-up" novels which are really linked short stories.

The Martian Chronicles came from this

as did

City by Clifford Simak

Winesburg, Ohio by Sherwood Anderson is a linked collection of short stories.

As far as changing stories, I've seen many an introduction that said a author in retrospect didn't like the result of a story, but usually did not change it. I was just reading an Ursula K. LeGuin essay about how she would now re-write something she wrote in the past. She added parenthetical changes to the piece. Interesting.